The Chinese government has blocked tens of thousands of web sites that mainly host personal videos, as well as site access means that foreign reporters widely use when they bypass the Chinese government’s technical control. According to Reporters Without Borders (RWB), this has been a nightmare for a lot of Chinese netizens, because Facebook and Twitter are both blocked – along with a large number of blogs. The authorities conducted a comprehensive security control operation, which included security checks on around 4500 reporters from 108 countries.
Source: Radio France International, September 30, 2009
http://www.rfi.fr/actucn/articles/117/article_16471.asp